Aquaculture is susceptible to a range of diseases caused by bacteria, viruses, fungi, and parasites, all of which can significantly affect fish health and production. Bacterial diseases like vibriosis and furunculosis can lead to rapid fish mortality, while viral infections such as koi herpesvirus (KHV) can cause severe outbreaks. Mycotic diseases, including fungal infections, often affect weakened fish, while parasitic infestations, such as sea lice or protozoan parasites, can reduce growth rates and even lead to mass fish kills. Early detection, regular health monitoring, and effective treatment strategies are essential for managing these diseases and ensuring the profitability and sustainability of aquaculture systems.